CAJ | 학술논문

以改进的原位合成路线,于管状氧化铝载体上合成了高性能的LTA型分子筛膜.考察了常规加热和微波加热对合成的影响.对于95%的异丙醇原料液,常规加热合成和微波加热合成的分子筛膜表现出了相似的优良性能.但是,当原料液中的水含量低于2.0%时,常规加热合成的分子筛膜不再具有有效的脱水性能,这是由于其膜层中有相当数量的纳米级缺陷孔存在.采用微波加热在很大程度上消除了合成过程中非分子筛缺陷孔的生成.
이개진적원위합성로선,우관상양화려재체상합성료고성능적LTA형분자사막.고찰료상규가열화미파가열대합성적영향.대우95%적이병순원료액,상규가열합성화미파가열합성적분자사막표현출료상사적우량성능.단시,당원료액중적수함량저우2.0%시,상규가열합성적분자사막불재구유유효적탈수성능,저시유우기막층중유상당수량적납미급결함공존재.채용미파가열재흔대정도상소제료합성과정중비분자사결함공적생성.
High-performance LTA zeolite membranes were synthesized on tubular supports by a modified in situ synthesis strategy. The preparation by conventional heating (CH) and microwave heating (MH) was studied. Both CH- and MH-synthesized membranes showed high dehydration performance toward 95.0% isopropanol/water mixtures. However, when the water content in the feed was lower than 2.0%, the CH-synthesized membrane had no separation ability any more. This is due to the existence of nanosized non-zeolite pores in the zeolite membranes. These defects could be eliminated mostly using fast and homogenous MH.